AMS1076
DESCRIPTION
The AMS1076 is a monolithic integrated step-
down switch mode converter with an internal
power MOSFET. It achieves 1A continuous
output current over a wide input supply range
with excellent load and line regulation.
Current mode operation provides fast transient
response and eases loop stabilization.
Fault condition protection includes cycle-by-cycle
current limiting and thermal shutdown.
The AMS1076 requires a minimum number of
readily available standard external components.
The AMS1076 is available in SOT23-6 packages.
FEATURES
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1A Output Current
0.45Ω Internal Power MOSFET Switch
Stable with Low ESR Output Ceramic
Capacitors
Up to 92% Efficiency
0.1μA Shutdown Mode
Fixed 1.4MHz Frequency
Thermal Shutdown
Cycle-by-Cycle Over Current Protection
Wide 4.5V to 18V Operating Input Range
Output Adjustable from 0.81V to 15V
Available in SOT23-6 Packages
Hand Disk Drive
xDSL Modems Cable
Set-Top Box
APPLICATIONS
TYPICAL APPLICATION
V
IN
5
IN
BST
1
12V
CB
10nF
AMS1076
OFF ON
4
EN
SW
6
D1
B230A
FB
3
V
OUT
3.3V @ 1A
GND
2
Vout=0.81x(1+R1/R2) (V)
1
Advanced Monolithic Systems http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
